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annotate lphobos/gc/gclinux.d @ 883:b52d5de7783f

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GC defines and linkage changes.
author Christian Kamm <kamm incasoftware de>
date Thu, 08 Jan 2009 18:20:02 +0100
parents 61615fa85940
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
94
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1
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2 // Copyright (C) 2001-2004 by Digital Mars, www.digitalmars.com
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3 // All Rights Reserved
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4 // Written by Walter Bright
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5
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6 import std.c.linux.linuxextern;
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7 import std.c.linux.linux;
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8
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9 /+
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10 extern (C)
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11 {
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12 // from <sys/mman.h>
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13 void* mmap(void* addr, uint len, int prot, int flags, int fd, uint offset);
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14 int munmap(void* addr, uint len);
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15 const void* MAP_FAILED = cast(void*)-1;
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16
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17 // from <bits/mman.h>
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18 enum { PROT_NONE = 0, PROT_READ = 1, PROT_WRITE = 2, PROT_EXEC = 4 }
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19 enum { MAP_SHARED = 1, MAP_PRIVATE = 2, MAP_TYPE = 0x0F,
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20 MAP_FIXED = 0x10, MAP_FILE = 0, MAP_ANON = 0x20 }
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21 }
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22 +/
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23
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24 /***********************************
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25 * Map memory.
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26 */
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27
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28 void *os_mem_map(uint nbytes)
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29 { void *p;
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30
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31 //errno = 0;
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32 p = mmap(null, nbytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
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33 return (p == MAP_FAILED) ? null : p;
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34 }
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35
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36 /***********************************
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37 * Commit memory.
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38 * Returns:
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39 * 0 success
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40 * !=0 failure
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41 */
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42
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43 int os_mem_commit(void *base, uint offset, uint nbytes)
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44 {
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45 return 0;
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46 }
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47
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48
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49 /***********************************
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50 * Decommit memory.
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51 * Returns:
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52 * 0 success
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53 * !=0 failure
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54 */
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55
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56 int os_mem_decommit(void *base, uint offset, uint nbytes)
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57 {
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58 return 0;
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59 }
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60
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61 /***********************************
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62 * Unmap memory allocated with os_mem_map().
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63 * Returns:
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64 * 0 success
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65 * !=0 failure
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66 */
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67
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68 int os_mem_unmap(void *base, uint nbytes)
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69 {
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70 return munmap(base, nbytes);
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71 }
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72
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73
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74 /**********************************************
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75 * Determine "bottom" of stack (actually the top on x86 systems).
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76 */
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77
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78 void *os_query_stackBottom()
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79 {
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80 version (none)
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81 { // See discussion: http://autopackage.org/forums/viewtopic.php?t=22
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82 static void** libc_stack_end;
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83
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84 if (libc_stack_end == libc_stack_end.init)
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85 {
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86 void* handle = dlopen(null, RTLD_NOW);
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87 libc_stack_end = cast(void **)dlsym(handle, "__libc_stack_end");
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88 dlclose(handle);
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89 }
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90 return *libc_stack_end;
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91 }
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92 else
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93 { // This doesn't resolve on all versions of Linux
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94 return __libc_stack_end;
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95 }
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96 }
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97
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98
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99 /**********************************************
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100 * Determine base address and size of static data segment.
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101 */
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102
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103 void os_query_staticdataseg(void **base, uint *nbytes)
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104 {
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105 *base = cast(void *)&__data_start;
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106 *nbytes = cast(byte *)&_end - cast(byte *)&__data_start;
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107 }